Difference of Absolute, Gauge, Sealed Gauge and Differential Pressure Type

Date: 2020-Sep-02

MmicroSensor products

In order to choose a pressure sensor suitable for different applications, pressure type is one of the key specifications including range, output signals, etc.

Gauge Pressure

It takes the atmospheric pressure as the reference point. Since the atmospheric pressure may vary according to different locations, a gauge pressure sensor is needed to ensure accurate pressure measurement.

Generally, a gauge pressure sensor has a vented tube connecting atmosphere pressure as a reference point to measure the media pressure.

Sealed Gauge Pressure

It uses a pre-determined pressure as a reference point. For MicroSensor pressure sensor, we use our local barometric pressure as a reference. The sealed gauge pressure transducer generally applies for high-pressure measurements where atmospheric pressure changes slightly affect the sensor's accuracy. 

Absolute Pressure

It is the absolute zero point, with perfect vacuum as the reference point. A formula shows the relationship between gauge and absolute pressure:

Absolute pressure = gauge pressure + atmospheric pressure

Differential Pressure

The pressure difference between two points or systems is known as differential pressure. Gauge is a specific differential pressure in that one pressure is always atmospheric. Differential Pressure is commonly associated with industrial processes because it is an important element used to maintain the proper pressure conditions for the effective working of the whole system. These gauges have two inlet ports (high-pressure port and low-pressure port) and each port is connected to the fluids whose pressure needs to be determined. Micro Sensor offers a series of differential pressure sensors for differential pressure measurement.

How do You Choose the Pressure Type?

The pressure measurement of liquids or gas, the pressure range is one factor of pressure type.

Pressure Range:≤ 0.02Mpa, ≥3.5MPa, 0.035MPa~3.5MPa.

Pressure Type: Gauge, Sealed Gauge, Absolute, Gauge, Absolute.

Owning to the different atmospheric pressures based on location, weather, and altitudes, the specific scenes require different pressure types. Our experienced and professional sales engineers are pleased to offer help if you are unsure which to choose.

No matter absolute pressure, gauge pressure or differential pressure, Micro Sensor provides related pressure sensors and pressure transmitters for each type of pressure.

Contact Us

Feel free to contact us with your unique requirements, quotations and suggestions are welcomed via sales@microsesor.cn or just leave us messages.


Previous posts: Common Malfunction and Solutions of 4~20mA Pressure Transmitter

Next chapter: FAQs about Micro Sensor Service and Payment

Related Products

High Pressure Range Pressure Sensor

Water Pressure Transmitter

-10~80℃ Compensated

more info...

Differential Pressure Sensor

Water Pressure Transmitter

2Bar ‒ 35Bar
Compensated temperature: 0~70℃

more info...

Thread Connected Pressure Sensor

Water Pressure Transmitter

Φ12×13.5mm M14×1.5-6g
100Bar ‒ 1000Bar

more info...

Hydrogen Pressure Sensor

Water Pressure Transmitter

Gold plated
Gauge, sealed gauge, absolute

more info...


Contact Us

If you still can't find what you're looking for, please contact us with more details so that we can provide you with a suitable solution.


No. 18, Yingda Road,
Baoji, 721006,Shaanxi,P.R.China

German Subsidiary
Micro Sensor GmbH
Girardetstr. 6, D-45131 Essen, Germany

Tel: +86-29-88346384
Whatsapp: 15114817352
Email: sales@microsensor.cn